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>Path: infoac!unido!mcsun!uunet!elroy.jpl.nasa.gov!swrinde!mips!pacbell.com!ucsd!news-mail-gateway
>From: oler@HG.ULeth.CA (CARY OLER)
>Newsgroups: rec.radio.amateur.misc
>Subject: GEOMAGNETIC STORM ALERT UPDATE - ACTIVITY DOWNGRADED
>Message-ID: <910430170352.21e003ef@HG.ULeth.CA>
>Date: 30 Apr 91 23:03:52 GMT
>Sender: daemon@ucsd.Edu
>Organization: UCSD Usenet Gateway
>Lines: 44


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                            GEOMAGNETIC STORM UPDATE

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                               23:00 UT, 30 April

                                 -------------


STORM UPDATE INFORMATION:

     Geomagnetic activity has declined over the past 24 hours.  The storm has
been downgraded from major to minor and for all intents and purposes has
ended as of 23:00 UT on 30 April.  This will be the last Geomagnetic Storm
Alert Update unless reintensification occurs (which is very unlikely).

     Geomagnetic activity is expected to continue to decline to generally
unsettled conditions by 02 May.  The activity we experienced was the result
of several well placed coronal holes.  Conditions at the present time are
hovering between unsettled and very active levels.  Some brief periods of
low-intensity minor storming are still possible over the high latitude
regions, although for the most part, geomagnetic storming has ended.

     Auroral activity has declined to more dormant and diffuse levels and is
not expected to reintensify.  The near-full phase of the moon made spotting
auroral activity very difficult, despite the rather high levels of storming
which occurred.

     HF propagation conditions have improved substantially over the past 12
hours.  Conditions are expected to improve further, particularly over the
higher latitudes, as time progresses.  A return to normal or near-normal
conditions is expected for the middle and low latitudes on 01 May, with the
high latitudes stabilizing to more normal conditions (fair conditions) by 02
May.

     VHF conditions will return to normal by 01 May over most latitudes.
Conditions are no longer favorable for VHF auroral backscatter communications
over the middle latitudes.


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